6
NEOTECHA
NEOSEAL BUTTERFLY VALVE
INSTALLATION AND MAINTENANCE INSTRUCTIONS
10 SERVICING AND MAINTENANCE
No routine maintenance or lubrication is
required. However, for systems with high
temperatures, an inspection for leakage at
the flanges should be carried out shortly
after installation. The different coefficients of
expansion and temperature expansions can
cause settlement of the PTFE. Tightening the
bolts once again will remedy this. This process
may possibly have to be repeated several times.
We recommend that the valve be operated at
least once a month.
11 CAUSE AND REMEDY OF OPERATING
FAULTS
If the valve function or operating action is
faulty, a check should be made to ensure that
the assembly and installation work has been
carried out and completed in accordance with
the installation and maintenance instructions.
The information relating to material, pressure,
temperature and direction of flow should be
compared with the installation diagram of the
pipeline system. Furthermore, a check should
be made on whether the installation conditions
correspond to the technical data given in the
data sheet or on the rating plate.
The safety regulations must always be
observed when troubleshooting.
12 DECOMMISSIONING
Removal of the valve for repair or servicing
is often carried out carelessly, as the valve
has to be repaired or replaced. However, it is
recommended that the valve is removed with
care, without damaging the PTFE, so that the
possible cause of damage can be determined
after removal.
13 DISPOSAL
Hand in the correctly cleaned valve to the
scrap material recycling plant.
Badly cleaned valves can cause severe burning
of the hands and other parts of the body.
If the valve is passed on to a third party, the
manufacturer does not guarantee the safety
of the valve.
ATTENTION!
Check that the pipe is depressurized and drained.
With corrosive, inflammable, aggressive or toxic
media, ventilate the pipeline system.
1. Only allow assembly work to be carried out
by qualified personnel (see Section 2.2).
2. Almost completely close the butterfly valve
(the disc is in line with the flat faces of the
operating shaft).
3. Loosen all flange bolts and withdraw
them until the valve can be removed.
4. Spread the flanges apart using a
suitable tool and withdraw the valve.
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Neotecha is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson
and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.
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